Patents by Inventor Jacobus Cornelius Gideon Kotze Van Der Colf

Jacobus Cornelius Gideon Kotze Van Der Colf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Production of titanium slag
    Patent number: 5997606
    Abstract: A process for producing titanium slag which is low in radioactivity wherein molten titanium slag, produced by smelting ilmenite in the presence of a reductant in a DC electric arc furnace, is separated from molten iron, boron in an amount which is less than 2.5% equivalent B.sub.2 O.sub.3 of the slag is blended with the molten slag which thereafter is allowed to cool to form a glassy phase which contains the bulk of the radioactive elements of the slag before being crushed to particles below about 1 mm, whereafter the radioactive elements are leached to leave a titanium slag product which is low in radioactivity.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: December 7, 1999
    Assignee: Billiton SA Limited
    Inventors: Jacobus Cornelius Gideon Kotze Van Der Colf, Johannes Nell, Frances Stander